MESON Chess Problem Database

Problem Display
PID: 287311 (6b1/2Q5/5N1n/4p1p1/1p1n1k2/6N1/1K1PP2P/8 w - - 0 1)

Bowell, Gerald P

The Problemist, 1944

6b1/2Q5/5N1n/4p1p1/1p1n1k2/6N1/1K1PP2P/8

#2

7 + 7

6490 yacpdb 2026

SOLUTION

  • SOUND
  • Sets
    • 1...Sf3
      • 2.e3#
    • 1...Sdf5
      • 2.Sgh5#
    • 1...Sg4
      • 2.Sfh5#
    • 1...Shf5
      • 2.Sgh5#
  • Tries
    • 1.Qc3?
      • threat
        • 2.Qe3#
      • 1...e4
        • 2.Qc7#
      • 1...Sc2
        • 2.Qf3#
      • 1...Sdf5
        • 2.Sgh5#
        • 2.Qf3#
      • 1...Sg4
        • 2.Sfh5#
      • 1...Shf5
        • 2.Sgh5#
      • 1...bxc3+!
    • 1.Qh7?
      • threat
        • 2.Sgh5#
        • 2.Qe4#
      • 1...Sxe2
        • 2.Qe4#
      • 1...e4
        • 2.Qxe4#
        • 2.Qc7#
      • 1...g4
        • 2.Qxh6#
      • 1...Bd5
        • 2.Sgh5#
      • 1...Bf7
        • 2.Qe4#
      • 1...Sdf5
        • 2.Sgh5#
      • 1...Shf5
        • 2.Sgh5#
      • 1...Bxh7!
  • Keys
    • 1.Qc1!
      • threat
        • 2.d3#
      • 1...Sxe2
        • 2.Qf1#
      • 1...e4
        • 2.Qc7#
      • 1...Sc2
        • 2.Qf1#
      • 1...Sb3
        • 2.Qf1#
      • 1...Sf3
        • 2.e3#
      • 1...Sdf5
        • 2.Sgh5#
        • 2.Qf1#
      • 1...Sg4
        • 2.Sfh5#
      • 1...Shf5
        • 2.Sgh5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • S(b);SBLOCK::P(C)
    • S(b);SBLOCK::S(E)
    • S(f);SBLOCK::S(F)
    • S(f);SBLOCK::S(E)
  • Tries
    • Try
      • Q(G);N_PINP(d)
      • Threat
        • QAB1(G)
      • Vars
        • P(d);OGATEB::QAB(G)
        • S(b);N_GUARD::QAR1(G)
        • S(f);SBLOCK::S(F)
        • S(f);SBLOCK::S(E)
      • Refutation
        • P(a);CHECK,XQ(G)
    • Try
      • Q(G);N_PINP(d)
      • Threat
        • DUALS(2)
      • Vars
        • S(b);XP(C)::QAR1(G)
        • P(e);OGATEB::QAB(G),XS(f)
        • B(g);::S(E)
        • B(g);::QAR1(G)
        • S(b);::S(E)
        • S(f);::S(E)
      • Refutation
        • B(g);XQ(G)
  • Actual
    • Q(G);N_PINP(d)
    • Threat
      • QAB(G)+P(B)
    • Vars
      • S(b);N_GUARD,XP(C)::QAR(G)
      • P(d);OGATEB::QAB(G)
      • S(b);N_GUARD::QAR(G)
      • S(b);SBLOCK::P(C)
      • S(f);SBLOCK::S(F)
      • S(f);SBLOCK::S(E)
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Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).